Unable to export chart using HTTP server about node-export-server HOT 3 CLOSED

I have encountered the same problem with v1.0.15.
At last, i found that , the infile field requries an string, not a object. That is, you can try it like below:
curl -H "Content-Type: application/json" -X POST -d '{"infile":"{"title": {"text": "Steep Chart"}, "xAxis": {"categories": ["Jan", "Feb", "Mar"]}, "series": [{"data": [29.9, 71.5, 106.4]}]}"}' 127.0.0.1:3000 -o mychart.png

from node-export-server.

I am also struggling with somehow same problem:
When I sent request through postman application, I am getting this error:
Thu Jun 07 2018 15:01:10 GMT+0530 (India Standard Time) [error] socket error: { Error: Parse Error, bytesParsed: 0, code: 'HPE_INVALID_METHOD', Packet:<Buffer 16 03 01 02 00 01 00 01 fc 03 03 74 3d ad 38 d0 cb 27 88 ec 95 9b c7 4c 87 9a 09 ed 26 7e ad 74 5d 90 50 7c ba ec 7d 26 28 c1 b1 20 3d f3 80 05 92 54 .. > }

My Postman request is :
URL: https://localhost:3003
Content-Type:application/json
Body: { "xAxis": { "categories": [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ]x }, "series": [ { "data": [1,3,2,4], "type": "line" }, { "data": [5,3,4,2], "type":"line" } ] }

from node-export-server.

HTTP exports work as expected (tested on: https://github.com/highcharts/node-export-server/tree/enhancement/puppeteer).

from node-export-server.